Paddy heard that a fortune could be made working as a lumberjack in Canada. So off he goes. After some weeks, he arrives at a lumberjack camp and asks the foreman for a job.
"Okay, sonny, but you have to do a test first. If you can chop down 100 trees tomorrow, you're hired."
So the next day, Paddy gets his chainsaw and happily saws away all day. When the trees are counted, Paddy only has 98. "Oh well," says the foreman, "you'll get another chance tomorrow."
Next day, same story – 99 trees. "I don't believe this," says the Forman, "a big fella like you should be able to cut down 100 trees in a day. You get one more chance, and I'll join you to show you the trick of it."
Next day, Paddy and the foreman go into the forest. Upon arrival at a nice spot, the foreman puts the chainsaw on the ground and starts the engine.
Says Paddy, "Holy Cow! Where's the noise coming from?"